A simple key value store where pairs can expire after a set interval

Add this to your application's shard.yml:

dependencies:
  cache_hash:
    github: samueleaton/cache-hash

require "cache_hash"

cache_hash = CacheHash(String).new(2.seconds)

cache_hash.set "city1", "Seattle"
sleep 1 # one second elapsed

cache_hash.set "city2", "Hong Kong"
sleep 1 # two seconds elapsed

cache_hash.get "city1" #=> nil
cache_hash.get "city2" #=> "Hong Kong"

Defines the type(s) for the values.

CacheHash(String).new(1.minute)

Creates a new instance of CacheHash and sets the cache interval.

Adds a key/value pair to the hash, where V is the type(s) defined at CacheHash(V), and saves the time of the action.

Returns the value for the the associated key. If the pair is stale (expired) or does not exists, it returns nil. If it exists but is expired, it is deleted before returning nil.

Removes all key/value pairs from the hash.

Removes all stale key/value pairs from the hash.

Runs purge_stale and returns an array of all the the non-stale keys.

Returns true if the key/value pair exists and is not stale. If the pair is stale (expired) or does not exists, it returns false. If it exists but is expired, it is deleted before returning false.

Returns the time the key/value pair was cached. If the pair is stale (expired) or does not exists, it returns nil. If it exists but is expired, it is deleted before returning nil.

Refreshes the time for the key/value pair and returns the hash value if successful, otherwise returns nil.

1. Fork it ( https://github.com/samueleaton/cache_hash/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

• Sam Eaton - creator, maintainer